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usbtv-video.c
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linux-6.19.14/drivers/media/usb/usbtv/usbtv-video.c
1/* 2 * Copyright (c) 2013,2016 Lubomir Rintel 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification. 11 * 2. The name of the author may not be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * Alternatively, this software may be distributed under the terms of the 15 * GNU General Public License ("GPL"). 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29/* 30 * Fushicai USBTV007 Audio-Video Grabber Driver 31 * 32 * Product web site: 33 * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html 34 * 35 * Following LWN articles were very useful in construction of this driver: 36 * Video4Linux2 API series: http://lwn.net/Articles/203924/ 37 * videobuf2 API explanation: http://lwn.net/Articles/447435/ 38 * Thanks go to Jonathan Corbet for providing this quality documentation. 39 * He is awesome. 40 * 41 * No physical hardware was harmed running Windows during the 42 * reverse-engineering activity 43 */ 44 45#include <media/v4l2-ioctl.h> 46#include <media/videobuf2-v4l2.h> 47 48#include "usbtv.h" 49 50static const struct usbtv_norm_params norm_params[] = { 51 { 52 .norm = V4L2_STD_525_60, 53 .cap_width = 720, 54 .cap_height = 480, 55 }, 56 { 57 .norm = V4L2_STD_625_50, 58 .cap_width = 720, 59 .cap_height = 576, 60 } 61}; 62 63static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm) 64{ 65 int i, ret = 0; 66 const struct usbtv_norm_params *params = NULL; 67 68 for (i = 0; i < ARRAY_SIZE(norm_params); i++) { 69 if (norm_params[i].norm & norm) { 70 params = &norm_params[i]; 71 break; 72 } 73 } 74 75 if (params) { 76 if (vb2_is_busy(&usbtv->vb2q) && 77 (usbtv->width != params->cap_width || 78 usbtv->height != params->cap_height)) 79 return -EBUSY; 80 usbtv->width = params->cap_width; 81 usbtv->height = params->cap_height; 82 usbtv->n_chunks = usbtv->width * usbtv->height 83 / 4 / USBTV_CHUNK; 84 usbtv->norm = norm; 85 } else 86 ret = -EINVAL; 87 88 return ret; 89} 90 91static int usbtv_select_input(struct usbtv *usbtv, int input) 92{ 93 int ret; 94 95 static const u16 composite[][2] = { 96 { USBTV_BASE + 0x0105, 0x0060 }, 97 { USBTV_BASE + 0x011f, 0x00f2 }, 98 { USBTV_BASE + 0x0127, 0x0060 }, 99 { USBTV_BASE + 0x00ae, 0x0010 }, 100 { USBTV_BASE + 0x0239, 0x0060 }, 101 }; 102 103 static const u16 svideo[][2] = { 104 { USBTV_BASE + 0x0105, 0x0010 }, 105 { USBTV_BASE + 0x011f, 0x00ff }, 106 { USBTV_BASE + 0x0127, 0x0060 }, 107 { USBTV_BASE + 0x00ae, 0x0030 }, 108 { USBTV_BASE + 0x0239, 0x0060 }, 109 }; 110 111 switch (input) { 112 case USBTV_COMPOSITE_INPUT: 113 ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite)); 114 break; 115 case USBTV_SVIDEO_INPUT: 116 ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo)); 117 break; 118 default: 119 ret = -EINVAL; 120 } 121 122 if (!ret) 123 usbtv->input = input; 124 125 return ret; 126} 127 128static uint16_t usbtv_norm_to_16f_reg(v4l2_std_id norm) 129{ 130 /* NTSC M/M-JP/M-KR */ 131 if (norm & V4L2_STD_NTSC) 132 return 0x00b8; 133 /* PAL BG/DK/H/I */ 134 if (norm & V4L2_STD_PAL) 135 return 0x00ee; 136 /* SECAM B/D/G/H/K/K1/L/Lc */ 137 if (norm & V4L2_STD_SECAM) 138 return 0x00ff; 139 if (norm & V4L2_STD_NTSC_443) 140 return 0x00a8; 141 if (norm & (V4L2_STD_PAL_M | V4L2_STD_PAL_60)) 142 return 0x00bc; 143 if (norm & V4L2_STD_PAL_Nc) 144 return 0x00fe; 145 /* Fallback to automatic detection for other standards */ 146 return 0x0000; 147} 148 149static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm) 150{ 151 int ret; 152 /* These are the series of register values used to configure the 153 * decoder for a specific standard. 154 * The first 21 register writes are copied from the 155 * Settings\DecoderDefaults registry keys present in the Windows driver 156 * .INF file, and control various image tuning parameters (color 157 * correction, sharpness, ...). 158 */ 159 static const u16 pal[][2] = { 160 /* "AVPAL" tuning sequence from .INF file */ 161 { USBTV_BASE + 0x0003, 0x0004 }, 162 { USBTV_BASE + 0x001a, 0x0068 }, 163 { USBTV_BASE + 0x0100, 0x00d3 }, 164 { USBTV_BASE + 0x010e, 0x0072 }, 165 { USBTV_BASE + 0x010f, 0x00a2 }, 166 { USBTV_BASE + 0x0112, 0x00b0 }, 167 { USBTV_BASE + 0x0115, 0x0015 }, 168 { USBTV_BASE + 0x0117, 0x0001 }, 169 { USBTV_BASE + 0x0118, 0x002c }, 170 { USBTV_BASE + 0x012d, 0x0010 }, 171 { USBTV_BASE + 0x012f, 0x0020 }, 172 { USBTV_BASE + 0x0220, 0x002e }, 173 { USBTV_BASE + 0x0225, 0x0008 }, 174 { USBTV_BASE + 0x024e, 0x0002 }, 175 { USBTV_BASE + 0x024f, 0x0002 }, 176 { USBTV_BASE + 0x0254, 0x0059 }, 177 { USBTV_BASE + 0x025a, 0x0016 }, 178 { USBTV_BASE + 0x025b, 0x0035 }, 179 { USBTV_BASE + 0x0263, 0x0017 }, 180 { USBTV_BASE + 0x0266, 0x0016 }, 181 { USBTV_BASE + 0x0267, 0x0036 }, 182 /* End image tuning */ 183 { USBTV_BASE + 0x024e, 0x0002 }, 184 { USBTV_BASE + 0x024f, 0x0002 }, 185 }; 186 187 static const u16 ntsc[][2] = { 188 /* "AVNTSC" tuning sequence from .INF file */ 189 { USBTV_BASE + 0x0003, 0x0004 }, 190 { USBTV_BASE + 0x001a, 0x0079 }, 191 { USBTV_BASE + 0x0100, 0x00d3 }, 192 { USBTV_BASE + 0x010e, 0x0068 }, 193 { USBTV_BASE + 0x010f, 0x009c }, 194 { USBTV_BASE + 0x0112, 0x00f0 }, 195 { USBTV_BASE + 0x0115, 0x0015 }, 196 { USBTV_BASE + 0x0117, 0x0000 }, 197 { USBTV_BASE + 0x0118, 0x00fc }, 198 { USBTV_BASE + 0x012d, 0x0004 }, 199 { USBTV_BASE + 0x012f, 0x0008 }, 200 { USBTV_BASE + 0x0220, 0x002e }, 201 { USBTV_BASE + 0x0225, 0x0008 }, 202 { USBTV_BASE + 0x024e, 0x0002 }, 203 { USBTV_BASE + 0x024f, 0x0001 }, 204 { USBTV_BASE + 0x0254, 0x005f }, 205 { USBTV_BASE + 0x025a, 0x0012 }, 206 { USBTV_BASE + 0x025b, 0x0001 }, 207 { USBTV_BASE + 0x0263, 0x001c }, 208 { USBTV_BASE + 0x0266, 0x0011 }, 209 { USBTV_BASE + 0x0267, 0x0005 }, 210 /* End image tuning */ 211 { USBTV_BASE + 0x024e, 0x0002 }, 212 { USBTV_BASE + 0x024f, 0x0002 }, 213 }; 214 215 static const u16 secam[][2] = { 216 /* "AVSECAM" tuning sequence from .INF file */ 217 { USBTV_BASE + 0x0003, 0x0004 }, 218 { USBTV_BASE + 0x001a, 0x0073 }, 219 { USBTV_BASE + 0x0100, 0x00dc }, 220 { USBTV_BASE + 0x010e, 0x0072 }, 221 { USBTV_BASE + 0x010f, 0x00a2 }, 222 { USBTV_BASE + 0x0112, 0x0090 }, 223 { USBTV_BASE + 0x0115, 0x0035 }, 224 { USBTV_BASE + 0x0117, 0x0001 }, 225 { USBTV_BASE + 0x0118, 0x0030 }, 226 { USBTV_BASE + 0x012d, 0x0004 }, 227 { USBTV_BASE + 0x012f, 0x0008 }, 228 { USBTV_BASE + 0x0220, 0x002d }, 229 { USBTV_BASE + 0x0225, 0x0028 }, 230 { USBTV_BASE + 0x024e, 0x0008 }, 231 { USBTV_BASE + 0x024f, 0x0002 }, 232 { USBTV_BASE + 0x0254, 0x0069 }, 233 { USBTV_BASE + 0x025a, 0x0016 }, 234 { USBTV_BASE + 0x025b, 0x0035 }, 235 { USBTV_BASE + 0x0263, 0x0021 }, 236 { USBTV_BASE + 0x0266, 0x0016 }, 237 { USBTV_BASE + 0x0267, 0x0036 }, 238 /* End image tuning */ 239 { USBTV_BASE + 0x024e, 0x0002 }, 240 { USBTV_BASE + 0x024f, 0x0002 }, 241 }; 242 243 ret = usbtv_configure_for_norm(usbtv, norm); 244 245 if (!ret) { 246 /* Masks for norms using a NTSC or PAL color encoding. */ 247 static const v4l2_std_id ntsc_mask = 248 V4L2_STD_NTSC | V4L2_STD_NTSC_443; 249 static const v4l2_std_id pal_mask = 250 V4L2_STD_PAL | V4L2_STD_PAL_60 | V4L2_STD_PAL_M | 251 V4L2_STD_PAL_Nc; 252 253 if (norm & ntsc_mask) 254 ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc)); 255 else if (norm & pal_mask) 256 ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal)); 257 else if (norm & V4L2_STD_SECAM) 258 ret = usbtv_set_regs(usbtv, secam, ARRAY_SIZE(secam)); 259 else 260 ret = -EINVAL; 261 } 262 263 if (!ret) { 264 /* Configure the decoder for the color standard */ 265 const u16 cfg[][2] = { 266 { USBTV_BASE + 0x016f, usbtv_norm_to_16f_reg(norm) } 267 }; 268 ret = usbtv_set_regs(usbtv, cfg, ARRAY_SIZE(cfg)); 269 } 270 271 return ret; 272} 273 274static int usbtv_setup_capture(struct usbtv *usbtv) 275{ 276 int ret; 277 static const u16 setup[][2] = { 278 /* These seem to enable the device. */ 279 { USBTV_BASE + 0x0008, 0x0001 }, 280 { USBTV_BASE + 0x01d0, 0x00ff }, 281 { USBTV_BASE + 0x01d9, 0x0002 }, 282 283 /* These seem to influence color parameters, such as 284 * brightness, etc. */ 285 { USBTV_BASE + 0x0239, 0x0040 }, 286 { USBTV_BASE + 0x0240, 0x0000 }, 287 { USBTV_BASE + 0x0241, 0x0000 }, 288 { USBTV_BASE + 0x0242, 0x0002 }, 289 { USBTV_BASE + 0x0243, 0x0080 }, 290 { USBTV_BASE + 0x0244, 0x0012 }, 291 { USBTV_BASE + 0x0245, 0x0090 }, 292 { USBTV_BASE + 0x0246, 0x0000 }, 293 294 { USBTV_BASE + 0x0278, 0x002d }, 295 { USBTV_BASE + 0x0279, 0x000a }, 296 { USBTV_BASE + 0x027a, 0x0032 }, 297 { 0xf890, 0x000c }, 298 { 0xf894, 0x0086 }, 299 300 { USBTV_BASE + 0x00ac, 0x00c0 }, 301 { USBTV_BASE + 0x00ad, 0x0000 }, 302 { USBTV_BASE + 0x00a2, 0x0012 }, 303 { USBTV_BASE + 0x00a3, 0x00e0 }, 304 { USBTV_BASE + 0x00a4, 0x0028 }, 305 { USBTV_BASE + 0x00a5, 0x0082 }, 306 { USBTV_BASE + 0x00a7, 0x0080 }, 307 { USBTV_BASE + 0x0000, 0x0014 }, 308 { USBTV_BASE + 0x0006, 0x0003 }, 309 { USBTV_BASE + 0x0090, 0x0099 }, 310 { USBTV_BASE + 0x0091, 0x0090 }, 311 { USBTV_BASE + 0x0094, 0x0068 }, 312 { USBTV_BASE + 0x0095, 0x0070 }, 313 { USBTV_BASE + 0x009c, 0x0030 }, 314 { USBTV_BASE + 0x009d, 0x00c0 }, 315 { USBTV_BASE + 0x009e, 0x00e0 }, 316 { USBTV_BASE + 0x0019, 0x0006 }, 317 { USBTV_BASE + 0x008c, 0x00ba }, 318 { USBTV_BASE + 0x0101, 0x00ff }, 319 { USBTV_BASE + 0x010c, 0x00b3 }, 320 { USBTV_BASE + 0x01b2, 0x0080 }, 321 { USBTV_BASE + 0x01b4, 0x00a0 }, 322 { USBTV_BASE + 0x014c, 0x00ff }, 323 { USBTV_BASE + 0x014d, 0x00ca }, 324 { USBTV_BASE + 0x0113, 0x0053 }, 325 { USBTV_BASE + 0x0119, 0x008a }, 326 { USBTV_BASE + 0x013c, 0x0003 }, 327 { USBTV_BASE + 0x0150, 0x009c }, 328 { USBTV_BASE + 0x0151, 0x0071 }, 329 { USBTV_BASE + 0x0152, 0x00c6 }, 330 { USBTV_BASE + 0x0153, 0x0084 }, 331 { USBTV_BASE + 0x0154, 0x00bc }, 332 { USBTV_BASE + 0x0155, 0x00a0 }, 333 { USBTV_BASE + 0x0156, 0x00a0 }, 334 { USBTV_BASE + 0x0157, 0x009c }, 335 { USBTV_BASE + 0x0158, 0x001f }, 336 { USBTV_BASE + 0x0159, 0x0006 }, 337 { USBTV_BASE + 0x015d, 0x0000 }, 338 }; 339 340 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup)); 341 if (ret) 342 return ret; 343 344 ret = usbtv_select_norm(usbtv, usbtv->norm); 345 if (ret) 346 return ret; 347 348 ret = usbtv_select_input(usbtv, usbtv->input); 349 if (ret) 350 return ret; 351 352 ret = v4l2_ctrl_handler_setup(&usbtv->ctrl); 353 if (ret) 354 return ret; 355 356 return 0; 357} 358 359/* Copy data from chunk into a frame buffer, deinterlacing the data 360 * into every second line. Unfortunately, they don't align nicely into 361 * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels. 362 * Therefore, we break down the chunk into two halves before copying, 363 * so that we can interleave a line if needed. 364 * 365 * Each "chunk" is 240 words; a word in this context equals 4 bytes. 366 * Image format is YUYV/YUV 4:2:2, consisting of Y Cr Y Cb, defining two 367 * pixels, the Cr and Cb shared between the two pixels, but each having 368 * separate Y values. Thus, the 240 words equal 480 pixels. It therefore, 369 * takes 1.5 chunks to make a 720 pixel-wide line for the frame. 370 * The image is interlaced, so there is a "scan" of odd lines, followed 371 * by "scan" of even numbered lines. 372 * 373 * Following code is writing the chunks in correct sequence, skipping 374 * the rows based on "odd" value. 375 * line 1: chunk[0][ 0..479] chunk[0][480..959] chunk[1][ 0..479] 376 * line 3: chunk[1][480..959] chunk[2][ 0..479] chunk[2][480..959] 377 * ...etc. 378 */ 379static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd) 380{ 381 int half; 382 383 for (half = 0; half < 2; half++) { 384 int part_no = chunk_no * 2 + half; 385 int line = part_no / 3; 386 int part_index = (line * 2 + !odd) * 3 + (part_no % 3); 387 388 u32 *dst = &frame[part_index * USBTV_CHUNK/2]; 389 390 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src)); 391 src += USBTV_CHUNK/2; 392 } 393} 394 395/* Called for each 256-byte image chunk. 396 * First word identifies the chunk, followed by 240 words of image 397 * data and padding. */ 398static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk) 399{ 400 int frame_id, odd, chunk_no; 401 u32 *frame; 402 struct usbtv_buf *buf; 403 unsigned long flags; 404 405 /* Ignore corrupted lines. */ 406 if (!USBTV_MAGIC_OK(chunk)) 407 return; 408 frame_id = USBTV_FRAME_ID(chunk); 409 odd = USBTV_ODD(chunk); 410 chunk_no = USBTV_CHUNK_NO(chunk); 411 if (chunk_no >= usbtv->n_chunks) 412 return; 413 414 /* Beginning of a frame. */ 415 if (chunk_no == 0) { 416 usbtv->frame_id = frame_id; 417 usbtv->chunks_done = 0; 418 } 419 420 if (usbtv->frame_id != frame_id) 421 return; 422 423 spin_lock_irqsave(&usbtv->buflock, flags); 424 if (list_empty(&usbtv->bufs)) { 425 /* No free buffers. Userspace likely too slow. */ 426 spin_unlock_irqrestore(&usbtv->buflock, flags); 427 return; 428 } 429 430 /* First available buffer. */ 431 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list); 432 frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 433 434 /* Copy the chunk data. */ 435 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); 436 usbtv->chunks_done++; 437 438 /* Last chunk in a field */ 439 if (chunk_no == usbtv->n_chunks-1) { 440 /* Last chunk in a frame, signalling an end */ 441 if (odd && !usbtv->last_odd) { 442 int size = vb2_plane_size(&buf->vb.vb2_buf, 0); 443 enum vb2_buffer_state state = usbtv->chunks_done == 444 usbtv->n_chunks ? 445 VB2_BUF_STATE_DONE : 446 VB2_BUF_STATE_ERROR; 447 448 buf->vb.field = V4L2_FIELD_INTERLACED; 449 buf->vb.sequence = usbtv->sequence++; 450 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 451 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); 452 vb2_buffer_done(&buf->vb.vb2_buf, state); 453 list_del(&buf->list); 454 } 455 usbtv->last_odd = odd; 456 } 457 458 spin_unlock_irqrestore(&usbtv->buflock, flags); 459} 460 461/* Got image data. Each packet contains a number of 256-word chunks we 462 * compose the image from. */ 463static void usbtv_iso_cb(struct urb *ip) 464{ 465 int ret; 466 int i; 467 struct usbtv *usbtv = (struct usbtv *)ip->context; 468 469 switch (ip->status) { 470 /* All fine. */ 471 case 0: 472 break; 473 /* Device disconnected or capture stopped? */ 474 case -ENODEV: 475 case -ENOENT: 476 case -ECONNRESET: 477 case -ESHUTDOWN: 478 return; 479 /* Unknown error. Retry. */ 480 default: 481 dev_warn(usbtv->dev, "Bad response for ISO request.\n"); 482 goto resubmit; 483 } 484 485 for (i = 0; i < ip->number_of_packets; i++) { 486 int size = ip->iso_frame_desc[i].actual_length; 487 unsigned char *data = ip->transfer_buffer + 488 ip->iso_frame_desc[i].offset; 489 int offset; 490 491 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++) 492 usbtv_image_chunk(usbtv, 493 (__be32 *)&data[USBTV_CHUNK_SIZE * offset]); 494 } 495 496resubmit: 497 ret = usb_submit_urb(ip, GFP_ATOMIC); 498 if (ret < 0) 499 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n"); 500} 501 502static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv) 503{ 504 struct urb *ip; 505 int size = usbtv->iso_size; 506 int i; 507 508 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL); 509 if (ip == NULL) 510 return NULL; 511 512 ip->dev = usbtv->udev; 513 ip->context = usbtv; 514 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP); 515 ip->interval = 1; 516 ip->transfer_flags = URB_ISO_ASAP; 517 ip->transfer_buffer = kcalloc(USBTV_ISOC_PACKETS, size, 518 GFP_KERNEL); 519 if (!ip->transfer_buffer) { 520 usb_free_urb(ip); 521 return NULL; 522 } 523 ip->complete = usbtv_iso_cb; 524 ip->number_of_packets = USBTV_ISOC_PACKETS; 525 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS; 526 for (i = 0; i < USBTV_ISOC_PACKETS; i++) { 527 ip->iso_frame_desc[i].offset = size * i; 528 ip->iso_frame_desc[i].length = size; 529 } 530 531 return ip; 532} 533 534static void usbtv_stop(struct usbtv *usbtv) 535{ 536 int i; 537 unsigned long flags; 538 539 /* Cancel running transfers. */ 540 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 541 struct urb *ip = usbtv->isoc_urbs[i]; 542 543 if (ip == NULL) 544 continue; 545 usb_kill_urb(ip); 546 kfree(ip->transfer_buffer); 547 usb_free_urb(ip); 548 usbtv->isoc_urbs[i] = NULL; 549 } 550 551 /* Return buffers to userspace. */ 552 spin_lock_irqsave(&usbtv->buflock, flags); 553 while (!list_empty(&usbtv->bufs)) { 554 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs, 555 struct usbtv_buf, list); 556 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 557 list_del(&buf->list); 558 } 559 spin_unlock_irqrestore(&usbtv->buflock, flags); 560} 561 562static int usbtv_start(struct usbtv *usbtv) 563{ 564 int i; 565 int ret; 566 567 usbtv_audio_suspend(usbtv); 568 569 ret = usb_set_interface(usbtv->udev, 0, 0); 570 if (ret < 0) 571 return ret; 572 573 ret = usbtv_setup_capture(usbtv); 574 if (ret < 0) 575 return ret; 576 577 ret = usb_set_interface(usbtv->udev, 0, 1); 578 if (ret < 0) 579 return ret; 580 581 usbtv_audio_resume(usbtv); 582 583 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { 584 struct urb *ip; 585 586 ip = usbtv_setup_iso_transfer(usbtv); 587 if (ip == NULL) { 588 ret = -ENOMEM; 589 goto start_fail; 590 } 591 usbtv->isoc_urbs[i] = ip; 592 593 ret = usb_submit_urb(ip, GFP_KERNEL); 594 if (ret < 0) 595 goto start_fail; 596 } 597 598 return 0; 599 600start_fail: 601 usbtv_stop(usbtv); 602 return ret; 603} 604 605static int usbtv_querycap(struct file *file, void *priv, 606 struct v4l2_capability *cap) 607{ 608 struct usbtv *dev = video_drvdata(file); 609 610 strscpy(cap->driver, "usbtv", sizeof(cap->driver)); 611 strscpy(cap->card, "usbtv", sizeof(cap->card)); 612 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 613 return 0; 614} 615 616static int usbtv_enum_input(struct file *file, void *priv, 617 struct v4l2_input *i) 618{ 619 struct usbtv *dev = video_drvdata(file); 620 621 switch (i->index) { 622 case USBTV_COMPOSITE_INPUT: 623 strscpy(i->name, "Composite", sizeof(i->name)); 624 break; 625 case USBTV_SVIDEO_INPUT: 626 strscpy(i->name, "S-Video", sizeof(i->name)); 627 break; 628 default: 629 return -EINVAL; 630 } 631 632 i->type = V4L2_INPUT_TYPE_CAMERA; 633 i->std = dev->vdev.tvnorms; 634 return 0; 635} 636 637static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv, 638 struct v4l2_fmtdesc *f) 639{ 640 if (f->index > 0) 641 return -EINVAL; 642 643 f->pixelformat = V4L2_PIX_FMT_YUYV; 644 return 0; 645} 646 647static int usbtv_fmt_vid_cap(struct file *file, void *priv, 648 struct v4l2_format *f) 649{ 650 struct usbtv *usbtv = video_drvdata(file); 651 652 f->fmt.pix.width = usbtv->width; 653 f->fmt.pix.height = usbtv->height; 654 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; 655 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 656 f->fmt.pix.bytesperline = usbtv->width * 2; 657 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height); 658 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 659 660 return 0; 661} 662 663static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm) 664{ 665 struct usbtv *usbtv = video_drvdata(file); 666 *norm = usbtv->norm; 667 return 0; 668} 669 670static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm) 671{ 672 int ret = -EINVAL; 673 struct usbtv *usbtv = video_drvdata(file); 674 675 if (norm & USBTV_TV_STD) 676 ret = usbtv_select_norm(usbtv, norm); 677 678 return ret; 679} 680 681static int usbtv_g_input(struct file *file, void *priv, unsigned int *i) 682{ 683 struct usbtv *usbtv = video_drvdata(file); 684 *i = usbtv->input; 685 return 0; 686} 687 688static int usbtv_s_input(struct file *file, void *priv, unsigned int i) 689{ 690 struct usbtv *usbtv = video_drvdata(file); 691 692 return usbtv_select_input(usbtv, i); 693} 694 695static const struct v4l2_ioctl_ops usbtv_ioctl_ops = { 696 .vidioc_querycap = usbtv_querycap, 697 .vidioc_enum_input = usbtv_enum_input, 698 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap, 699 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap, 700 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap, 701 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap, 702 .vidioc_g_std = usbtv_g_std, 703 .vidioc_s_std = usbtv_s_std, 704 .vidioc_g_input = usbtv_g_input, 705 .vidioc_s_input = usbtv_s_input, 706 707 .vidioc_reqbufs = vb2_ioctl_reqbufs, 708 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 709 .vidioc_querybuf = vb2_ioctl_querybuf, 710 .vidioc_create_bufs = vb2_ioctl_create_bufs, 711 .vidioc_qbuf = vb2_ioctl_qbuf, 712 .vidioc_dqbuf = vb2_ioctl_dqbuf, 713 .vidioc_streamon = vb2_ioctl_streamon, 714 .vidioc_streamoff = vb2_ioctl_streamoff, 715}; 716 717static const struct v4l2_file_operations usbtv_fops = { 718 .owner = THIS_MODULE, 719 .unlocked_ioctl = video_ioctl2, 720 .mmap = vb2_fop_mmap, 721 .open = v4l2_fh_open, 722 .release = vb2_fop_release, 723 .read = vb2_fop_read, 724 .poll = vb2_fop_poll, 725}; 726 727static int usbtv_queue_setup(struct vb2_queue *vq, 728 unsigned int *nbuffers, 729 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 730{ 731 struct usbtv *usbtv = vb2_get_drv_priv(vq); 732 unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32); 733 unsigned int q_num_bufs = vb2_get_num_buffers(vq); 734 735 if (q_num_bufs + *nbuffers < 2) 736 *nbuffers = 2 - q_num_bufs; 737 if (*nplanes) 738 return sizes[0] < size ? -EINVAL : 0; 739 *nplanes = 1; 740 sizes[0] = size; 741 742 return 0; 743} 744 745static void usbtv_buf_queue(struct vb2_buffer *vb) 746{ 747 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 748 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue); 749 struct usbtv_buf *buf = container_of(vbuf, struct usbtv_buf, vb); 750 unsigned long flags; 751 752 if (usbtv->udev == NULL) { 753 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); 754 return; 755 } 756 757 spin_lock_irqsave(&usbtv->buflock, flags); 758 list_add_tail(&buf->list, &usbtv->bufs); 759 spin_unlock_irqrestore(&usbtv->buflock, flags); 760} 761 762static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count) 763{ 764 struct usbtv *usbtv = vb2_get_drv_priv(vq); 765 766 if (usbtv->udev == NULL) 767 return -ENODEV; 768 769 usbtv->last_odd = 1; 770 usbtv->sequence = 0; 771 return usbtv_start(usbtv); 772} 773 774static void usbtv_stop_streaming(struct vb2_queue *vq) 775{ 776 struct usbtv *usbtv = vb2_get_drv_priv(vq); 777 778 if (usbtv->udev) 779 usbtv_stop(usbtv); 780} 781 782static const struct vb2_ops usbtv_vb2_ops = { 783 .queue_setup = usbtv_queue_setup, 784 .buf_queue = usbtv_buf_queue, 785 .start_streaming = usbtv_start_streaming, 786 .stop_streaming = usbtv_stop_streaming, 787}; 788 789static int usbtv_s_ctrl(struct v4l2_ctrl *ctrl) 790{ 791 struct usbtv *usbtv = container_of(ctrl->handler, struct usbtv, 792 ctrl); 793 u8 *data; 794 u16 index, size; 795 int ret; 796 797 data = kmalloc(3, GFP_KERNEL); 798 if (!data) 799 return -ENOMEM; 800 801 /* 802 * Read in the current brightness/contrast registers. We need them 803 * both, because the values are for some reason interleaved. 804 */ 805 if (ctrl->id == V4L2_CID_BRIGHTNESS || ctrl->id == V4L2_CID_CONTRAST) { 806 ret = usb_control_msg(usbtv->udev, 807 usb_rcvctrlpipe(usbtv->udev, 0), USBTV_CONTROL_REG, 808 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 809 0, USBTV_BASE + 0x0244, (void *)data, 3, 810 USB_CTRL_GET_TIMEOUT); 811 if (ret < 0) 812 goto error; 813 } 814 815 switch (ctrl->id) { 816 case V4L2_CID_BRIGHTNESS: 817 index = USBTV_BASE + 0x0244; 818 size = 3; 819 data[0] &= 0xf0; 820 data[0] |= (ctrl->val >> 8) & 0xf; 821 data[2] = ctrl->val & 0xff; 822 break; 823 case V4L2_CID_CONTRAST: 824 index = USBTV_BASE + 0x0244; 825 size = 3; 826 data[0] &= 0x0f; 827 data[0] |= (ctrl->val >> 4) & 0xf0; 828 data[1] = ctrl->val & 0xff; 829 break; 830 case V4L2_CID_SATURATION: 831 index = USBTV_BASE + 0x0242; 832 data[0] = ctrl->val >> 8; 833 data[1] = ctrl->val & 0xff; 834 size = 2; 835 break; 836 case V4L2_CID_HUE: 837 index = USBTV_BASE + 0x0240; 838 size = 2; 839 if (ctrl->val > 0) { 840 data[0] = 0x92 + (ctrl->val >> 8); 841 data[1] = ctrl->val & 0xff; 842 } else { 843 data[0] = 0x82 + (-ctrl->val >> 8); 844 data[1] = -ctrl->val & 0xff; 845 } 846 break; 847 case V4L2_CID_SHARPNESS: 848 index = USBTV_BASE + 0x0239; 849 data[0] = 0; 850 data[1] = ctrl->val; 851 size = 2; 852 break; 853 default: 854 kfree(data); 855 return -EINVAL; 856 } 857 858 ret = usb_control_msg(usbtv->udev, usb_sndctrlpipe(usbtv->udev, 0), 859 USBTV_CONTROL_REG, 860 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 861 0, index, (void *)data, size, USB_CTRL_SET_TIMEOUT); 862 863error: 864 if (ret < 0) 865 dev_warn(usbtv->dev, "Failed to submit a control request.\n"); 866 867 kfree(data); 868 return ret; 869} 870 871static const struct v4l2_ctrl_ops usbtv_ctrl_ops = { 872 .s_ctrl = usbtv_s_ctrl, 873}; 874 875static void usbtv_release(struct v4l2_device *v4l2_dev) 876{ 877 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev); 878 879 v4l2_device_unregister(&usbtv->v4l2_dev); 880 v4l2_ctrl_handler_free(&usbtv->ctrl); 881 kfree(usbtv); 882} 883 884int usbtv_video_init(struct usbtv *usbtv) 885{ 886 int ret; 887 888 (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60); 889 890 spin_lock_init(&usbtv->buflock); 891 mutex_init(&usbtv->v4l2_lock); 892 mutex_init(&usbtv->vb2q_lock); 893 INIT_LIST_HEAD(&usbtv->bufs); 894 895 /* videobuf2 structure */ 896 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 897 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; 898 usbtv->vb2q.drv_priv = usbtv; 899 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf); 900 usbtv->vb2q.ops = &usbtv_vb2_ops; 901 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops; 902 usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 903 usbtv->vb2q.lock = &usbtv->vb2q_lock; 904 ret = vb2_queue_init(&usbtv->vb2q); 905 if (ret < 0) { 906 dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n"); 907 return ret; 908 } 909 910 /* controls */ 911 v4l2_ctrl_handler_init(&usbtv->ctrl, 4); 912 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 913 V4L2_CID_CONTRAST, 0, 0x3ff, 1, 0x1d0); 914 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 915 V4L2_CID_BRIGHTNESS, 0, 0x3ff, 1, 0x1c0); 916 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 917 V4L2_CID_SATURATION, 0, 0x3ff, 1, 0x200); 918 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 919 V4L2_CID_HUE, -0xdff, 0xdff, 1, 0x000); 920 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, 921 V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x60); 922 ret = usbtv->ctrl.error; 923 if (ret < 0) { 924 dev_warn(usbtv->dev, "Could not initialize controls\n"); 925 goto ctrl_fail; 926 } 927 928 /* v4l2 structure */ 929 usbtv->v4l2_dev.ctrl_handler = &usbtv->ctrl; 930 usbtv->v4l2_dev.release = usbtv_release; 931 ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev); 932 if (ret < 0) { 933 dev_warn(usbtv->dev, "Could not register v4l2 device\n"); 934 goto v4l2_fail; 935 } 936 937 /* Video structure */ 938 strscpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name)); 939 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev; 940 usbtv->vdev.release = video_device_release_empty; 941 usbtv->vdev.fops = &usbtv_fops; 942 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops; 943 usbtv->vdev.tvnorms = USBTV_TV_STD; 944 usbtv->vdev.queue = &usbtv->vb2q; 945 usbtv->vdev.lock = &usbtv->v4l2_lock; 946 usbtv->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 947 V4L2_CAP_STREAMING; 948 video_set_drvdata(&usbtv->vdev, usbtv); 949 ret = video_register_device(&usbtv->vdev, VFL_TYPE_VIDEO, -1); 950 if (ret < 0) { 951 dev_warn(usbtv->dev, "Could not register video device\n"); 952 goto vdev_fail; 953 } 954 955 return 0; 956 957vdev_fail: 958 v4l2_device_unregister(&usbtv->v4l2_dev); 959v4l2_fail: 960ctrl_fail: 961 v4l2_ctrl_handler_free(&usbtv->ctrl); 962 963 return ret; 964} 965 966void usbtv_video_free(struct usbtv *usbtv) 967{ 968 vb2_video_unregister_device(&usbtv->vdev); 969 v4l2_device_disconnect(&usbtv->v4l2_dev); 970 971 v4l2_device_put(&usbtv->v4l2_dev); 972}
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